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High-flame-retardancy high-flowability flaky molding compound and preparation method thereof

A sheet-like molding compound and high-flow technology, which is applied in the field of high-flame-retardant and high-flow sheet-like molding compound and its preparation, and the field of molding compound and its preparation, can solve the problems such as viscosity and fluidity of resin paste that are not involved, and can make up for mechanical Loss of properties, reduced viscosity, improved compaction and quality

Inactive Publication Date: 2017-01-04
陈小华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-flame-retardant and low-smoke sheet molding compound provided by this patent emphasizes smoke-free and is used for traffic interior decoration. It does not use a high-impact low-shrinkage agent system and does not involve resin paste viscosity and fluidity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] This embodiment also provides a preparation method for a high flame-retardant high-flow sheet molding compound, comprising the following steps:

[0027] a. Weigh unsaturated polyester resin, low shrinkage agent, flame retardant filler, initiator, p-benzoquinone, internal release agent, viscosity reducing agent and styrene in a certain proportion, and fully mix to obtain resin paste;

[0028] b. Mixing the thickener with styrene to obtain a thickener paste;

[0029] c. The resin paste and the thickener paste are mixed through the online mixing system of the SMC unit, and then impregnated and compacted with the chopped glass fiber to obtain the SMC sheet;

[0030] d. Place the SMC sheet at a certain temperature to mature, and after the indentation hardness reaches a certain range, it is molded under heating and pressure conditions to obtain a high flame-retardant and high-flow sheet molding compound.

Embodiment 1

[0032] Prepare vinyl resin 36.8kg, high-impact polystyrene 9.2kg, chopped E-glass yarn size 25.4mm, 26kg, TBPB 0.56kg, 6.5% PBQ solution 0.4kg, styrene 2.3kg, stearin Zinc acid 2kg, 8μ aluminum hydroxide 42kg, 10μ aluminum hydroxide 25kg, 40% magnesium oxide paste 2.1kg, BYK996 0.3kg.

[0033] The above materials except the thickener paste are weighed in a certain proportion, and fully mixed to obtain a resin paste. Chopped glass fibers are impregnated and compacted to obtain SMC sheets; the SMC sheets are placed and matured at 40°C, and after the hardness reaches 304, they are molded at 140-150°C to obtain high flame resistance and high flow Sheet molding compound, the sheet molding compound has passed the flame retardant test and is VO level flame retardant.

Embodiment 2

[0035] Prepare 20kg of isophthalic resin, 30kg of vinyl resin, 9.2kg of high-impact polystyrene, 25.4mm and 36kg of chopped E-glass yarn, 0.66kg of TBPB, 0.5kg of 6.5% PBQ solution, and 2.6kg of styrene , zinc stearate 2kg, 6μ aluminum hydroxide 20kg, 8μ aluminum hydroxide 58kg, 40% magnesium hydroxide paste 2.5kg, BYK996 0.5kg.

[0036] The above materials except the thickener paste are weighed in a certain proportion, and fully mixed to obtain a resin paste. Chopped glass fibers are impregnated and compacted to obtain SMC sheets. Place the SMC sheet at 40°C for curing, and after the indentation hardness reaches 304, mold it at 140-150°C to obtain a high flame-retardant and high-flow sheet molding compound, which has passed the flame-retardant test and is vo Grade flame retardant.

[0037]The high-impact polystyrene in this example is an impact-resistant polystyrene product produced by adding polybutyl rubber particles to polystyrene, and this polystyrene product will add m...

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Abstract

The invention relates to a high-flame-retardancy high-flowability flaky molding compound and a preparation method thereof, belonging to the field of chemical raw materials. The molding compound comprises the following substances in parts by mass: 15-30 parts of unsaturated polyester resin, 10-40 parts of glass fiber, 5-15 parts of low shrinkage agent, 30-60 parts of flame-retardant filler, 0.2-1 part of initiator, 0.02-0.1 part of para-benzoquinone, 0.2-1 part of thickener, 2-10 parts of styrene, 1-5 parts of internal molding lubricant and 0.1-0.5 part of viscosity breaking aid. The high-impact-resistance low shrinkage agent is adopted to make up for the loss of mechanical properties caused by the addition of the flame-retardant filler; the flame-retardant filler with different particle sizes performs the synergic filling functions to enhance the flame-retardant effect; and the viscosity breaking aid is utilized to lower the viscosity of the resin, thereby forming the high-flame-retardancy high-flowability flaky molding compound. The invention also provides a preparation method of the high-flame-retardancy high-flowability flaky molding compound.

Description

technical field [0001] The invention relates to a molding compound and a preparation method thereof, in particular to a high flame-retardant and high-flow sheet molding compound and a preparation method thereof, belonging to the field of chemical raw materials. Background technique [0002] Sheet molding compound is made of unsaturated polyester resin plus auxiliary materials such as a certain amount of thickener, filler, curing agent and accelerator, etc., and is pressed into a plate by an SMC press. It has been widely used in construction, Rail transit and bathroom market. With the increasingly stringent environmental protection regulations and safety regulations, developed countries in the world have issued a series of new flame retardant technical standards and regulations, such as the latest EU standard EN45545, American ASTM E84-06, the flame retardant of polymer materials and products Combustibility presents unprecedented requirements. Looking at these standards and...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L51/04C08L51/08C08K13/04C08K7/14C08K3/22C08K5/098
CPCC08L67/06C08L51/08C08L2201/02C08L2205/02C08L2205/03
Inventor 陈小华
Owner 陈小华
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